What does pope urban ii stay is happening to Jerusalem and the Christians who are visiting the city?

During the time of 6th century, a lot of Christians started going to the city of Jerusalem which was also known as the holy city and they went there to develop new pilgrim sites of their religion.

But when Seljuk Turks came into power in Jerusalem, they did not allow the Christians to enter the city or build any more pilgrims for their own religion and therefore it became a matter of conflict for the Christians of Europe.